Process for the manufacture of hydrophilic polymerization products of the superpolyamide type



I Patented A... 29, 1944 PROCESS FOR THE DBOPHILIC POLYME MANUFACTURE or in RIZATION raonuc'rs OF THE SUPEBPOLYAMIDE TYPE Max Hagedorn, Dessau, Germany; vested in the Allen Property Custodian No Drawinz. Application September 5, 1940,81:-

rial No. 355,455. In Germany July 18, 1939 (Cl. 260-'l8) 2 Claims.

This invention relates to the manufacture of hydrophilic synthetic linear condensation products of the superp lyamide typ In my copendlng U. S. patent application Ser. No. 355,454, flled Sept. 5, 1940, it has been shown that by condensation of w-amino carboxylic acid with at least 4 carbon atoms between the aminoand the carboxyl groups with the hydrohalides of u-amino carboxylic acids with at most 3 carbon atoms between the aminoand the carbolwl groups hydrophilic superpolyamldes are obtained which are swellable or colloidally soluble in water and assume the state of sol in an aqueous solution at elevated temperature, but become a-gel on cooling.

Example '10 grams hexamethylene diammonium sebacate (2 mols) are thoroughly mixed with 30 grams glycocolethylester hydrochloride and heated after careful displacement of the air by carbon dioxide in a carbon dioxide atmosphere at with glycocolethylester hydrochloride in substantially equal molar proportions, until condensation occurs.

2. As a new composition of matter hydrophilic synthetic linear superpolyamide essentially containing in polymerized form linear units of hexamethylenediammonium sebacate and glycocolethylester hydrochloride in substantially equal molar proportions.

MAX HAGEDORN. 

